SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Blanco I) "

Sökning: WFRF:(Blanco I)

Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  •  
2.
  • Aad, G, et al. (författare)
  • Determination of the Ratio of b-Quark Fragmentation Fractions f_{s}/f_{d} in pp Collisions at sqrt[s]=7 TeV with the ATLAS Detector.
  • 2015
  • Ingår i: Physical Review Letters. - : American Physical Society. - 1079-7114. ; 115:26
  • Tidskriftsartikel (refereegranskat)abstract
    • With an integrated luminosity of 2.47 fb^{-1} recorded by the ATLAS experiment at the LHC, the exclusive decays B_{s}^{0}→J/ψϕ and B_{d}^{0}→J/ψK^{*0} of B mesons produced in pp collisions at sqrt[s]=7 TeV are used to determine the ratio of fragmentation fractions f_{s}/f_{d}. From the observed B_{s}^{0}→J/ψϕ and B_{d}^{0}→J/ψK^{*0} yields, the quantity (f_{s}/f_{d})[B(B_{s}^{0}→J/ψϕ)/B(B_{d}^{0}→J/ψK^{*0})] is measured to be 0.199±0.004(stat)±0.008(syst). Using a recent theory prediction for [B(B_{s}^{0}→J/ψϕ)/B(B_{d}^{0}→J/ψK^{*0})] yields (f_{s}/f_{d})=0.240±0.004(stat)±0.010(syst)±0.017(th). This result is based on a new approach that provides a significant improvement of the world average.
  •  
3.
  • Aad, G., et al. (författare)
  • Measurement of colour flow with the jet pull angle in t(t)over-bar events using the ATLAS detector at root s=8 TeV
  • 2015
  • Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier. - 0370-2693 .- 1873-2445. ; 750, s. 475-493
  • Tidskriftsartikel (refereegranskat)abstract
    • The distribution and orientation of energy inside jets is predicted to be an experimental handle on colour connections between the hard-scatter quarks and gluons initiating the jets. This Letter presents a measurement of the distribution of one such variable, the jet pull angle. The pull angle is measured for jets produced in t (t) over bar events with one W boson decaying leptonically and the other decaying to jets using 20.3 fb(-1) of data recorded with the ATLAS detector at a centre-of-mass energy of root s = 8 TeV at the LHC. The jet pull angle distribution is corrected for detector resolution and acceptance effects and is compared to various models. (C) 2015 CERN for the benefit of the ATLAS Collaboration. Published by Elsevier B.V.
  •  
4.
  • Aad, G., et al. (författare)
  • Measurement of four-jet differential cross sections in root s=8 TeV proton-proton collisions using the ATLAS detector
  • 2015
  • Ingår i: Journal of High Energy Physics. - : Springer. - 1029-8479 .- 1126-6708. ; :12
  • Tidskriftsartikel (refereegranskat)abstract
    • Differential cross sections for the production of at least four jets have been measured in proton-proton collisions at root s = 8 TeV at the Large Hadron Collider using the ATLAS detector. Events are selected if the four anti-k(t) R = 0.4 jets with the largest transverse momentum (p(T)) within the rapidity range vertical bar y vertical bar < 2 : 8 are well separated (Delta R-4j(min) > 0.65), all have p(T) > 64 GeV, and include at least one jet with p(T) > 100 GeV. The dataset corresponds to an integrated luminosity of 20.3 fb(-1). The cross sections, corrected for detector effects, are compared to leading-order and next-to-leading-order calculations as a function of the jet momenta, invariant masses, minimum and maximum opening angles and other kinematic variables.
  •  
5.
  • Aad, G., et al. (författare)
  • Measurement of the branching ratio Gamma(Lambda(0)(b) -> Psi(2S)Lambda(0))/Gamma(Lambda(0.)(b) -> J/Psi Lambda(0)) with the ATLAS detector
  • 2015
  • Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier. - 0370-2693 .- 1873-2445. ; 751, s. 63-80
  • Tidskriftsartikel (refereegranskat)abstract
    • An observation of the Lambda(0)(b) -> Psi (2S) Lambda(0) decay and a comparison of its branching fraction with that of the Lambda(0)(b) -> Psi (2S) Lambda(0) decay has been made with the ATLAS detector in proton-proton collisions at root s = 8 TeVat the LHC using an integrated luminosity of 20.6fb(-1). The J/Psi and Psi(2S) mesons are reconstructed in their decays to a muon pair, while the Lambda(0) -> p pi(-) decay is exploited for the Lambda(0) 0baryon reconstruction. The Lambda(0)(b) baryons are reconstructed with transverse momentum p(T)> 10 GeVand pseudorapidity vertical bar eta vertical bar < 2.1. The measured branching ratio of the Lambda(0)(b) -> Psi (2S) Lambda(0) and Lambda(0)(b) -> Psi (2S) Lambda(0) decays is Gamma(Lambda(0)(b) -> Psi (2S) Lambda(0)) / Gamma(Lambda(0)(b) -> Psi (2S) Lambda(0)) = 0.501 +/- 0.033(stat) +/- 0.019(syst), lower than the expectation from the covariant quark model. (C) 2015 CERN for the benefit of the ATLAS Collaboration. Published by Elsevier B.V.
  •  
6.
  • Aad, G., et al. (författare)
  • Measurement of transverse energy-energy correlations in multi-jet events in pp collisions at root s=7 TeV using the ATLAS detector and determination of the strong coupling constant alpha(s)(m(Z))
  • 2015
  • Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier. - 0370-2693 .- 1873-2445. ; 750, s. 427-447
  • Tidskriftsartikel (refereegranskat)abstract
    • High transverse momentum jets produced in pp collisions at a centre of mass energy of 7 TeV are used to measure the transverse energy-energy correlation function and its associated azimuthal asymmetry. The data were recorded with the ATLAS detector at the LHC in the year 2011 and correspond to an integrated luminosity of 158 pb(-1). The selection criteria demand the average transverse momentum of the two leading jets in an event to be larger than 250 GeV. The data at detector level are well described by Monte Carlo event generators. They are unfolded to the particle level and compared with theoretical calculations at next-to-leading-order accuracy. The agreement between data and theory is good and provides a precision test of perturbative Quantum Chromodynamics at large momentum transfers. From this comparison, the strong coupling constant given at the Z boson mass is determined to be alpha(s)(m(Z)) = 0.1173 +/- 0.0010 (exp.) (+0.0065)(-0.0026) (theo.). (C) 2015 CERN for the benefit of the ATLAS Collaboration. Published by Elsevier B.V.
  •  
7.
  • Aad, G, et al. (författare)
  • Measurements of fiducial cross-sections for [Formula: see text] production with one or two additional b-jets in pp collisions at [Formula: see text]=8 TeV using the ATLAS detector.
  • 2016
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer. - 1434-6044. ; 76
  • Tidskriftsartikel (refereegranskat)abstract
    • Fiducial cross-sections for [Formula: see text] production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb[Formula: see text] of proton-proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for [Formula: see text] events with at least one additional b-jet is measured to be 950 [Formula: see text] 70 (stat.) [Formula: see text] (syst.) fb in the lepton-plus-jets channel and 50 [Formula: see text] 10 (stat.) [Formula: see text] (syst.) fb in the [Formula: see text] channel. The cross-section times branching ratio for events with at least two additional b-jets is measured to be 19.3 [Formula: see text] 3.5 (stat.) [Formula: see text] 5.7 (syst.) fb in the dilepton channel ([Formula: see text], [Formula: see text], and ee) using a method based on tight selection criteria, and 13.5 [Formula: see text] 3.3 (stat.) [Formula: see text] 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 [Formula: see text] 0.33 (stat.) [Formula: see text] 0.28 (syst.)% for the ratio of [Formula: see text] production with two additional b-jets to [Formula: see text] production with any two additional jets. All measurements are in good agreement with recent theory predictions.
  •  
8.
  • Aad, G., et al. (författare)
  • Search for an additional, heavy Higgs boson in the decay channel at in collision data with the ATLAS detector
  • 2016
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer. - 1434-6044 .- 1434-6052. ; 76:1
  • Tidskriftsartikel (refereegranskat)abstract
    • A search is presented for a high-mass Higgs boson in the , , , and decay modes using the ATLAS detector at the CERN Large Hadron Collider. The search uses proton-proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb. The results of the search are interpreted in the scenario of a heavy Higgs boson with a width that is small compared with the experimental mass resolution. The Higgs boson mass range considered extends up to for all four decay modes and down to as low as 140 , depending on the decay mode. No significant excess of events over the Standard Model prediction is found. A simultaneous fit to the four decay modes yields upper limits on the production cross-section of a heavy Higgs boson times the branching ratio to boson pairs. 95 % confidence level upper limits range from 0.53 pb at GeV to 0.008 pb at GeV for the gluon-fusion production mode and from 0.31 pb at GeV to 0.009 pb at GeV for the vector-boson-fusion production mode. The results are also interpreted in the context of Type-I and Type-II two-Higgs-doublet models.
  •  
9.
  • Aad, G., et al. (författare)
  • Search for flavour-changing neutral current top-quark decays to q Z in pp collision data collected with the ATLAS detector at root s=8 TeV
  • 2016
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer. - 1434-6044 .- 1434-6052. ; 76:1
  • Tidskriftsartikel (refereegranskat)abstract
    • A search for the flavour-changing neutral-current decay is presented. Data collected by the ATLAS detector during 2012 from proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of root s = 8 TeV, corresponding to an integrated luminosity of 20.3 fb(-1), are analysed. Top-quark pair-production events with one top quark decaying through the t -> qZ (q = u,c) channel and the other through the dominant Standard Model mode t -> bW are considered as signal. Only the decays of the Z boson to charged leptons and leptonic W boson decays are used. No evidence for a signal is found and an observed (expected) upper limit on the t -> qZ branching ratio of 7 x 10(-4) (8 x 10(-4)) is set at the 95 % confidence level.
  •  
10.
  • Aad, G., et al. (författare)
  • Search for pair production of a new heavy quark that decays into a W boson and a light quark in pp collisions at root s=8 TeV with the ATLAS detector
  • 2015
  • Ingår i: Physical Review D (Particles, Fields, Gravitation and Cosmology). - : American Physical Society. - 1550-2368 .- 1550-7998. ; 92:11
  • Tidskriftsartikel (refereegranskat)abstract
    • A search is presented for pair production of a new heavy quark (Q) that decays into aW boson and a light quark (q) in the final state where one W boson decays leptonically (to an electron or muon plus a neutrino) and the other W boson decays hadronically. The analysis is performed using an integrated luminosity of 20.3 fb(-1) of pp collisions at root s = 8 TeV collected by the ATLAS detector at the LHC. No evidence of Q (Q) over bar production is observed. New chiral quarks with masses below 690 GeVare excluded at 95% confidence level, assuming BR(Q -> Wq) = 1. Results are also interpreted in the context of vectorlike quark models, resulting in the limits on the mass of a vectorlike quark in the two-dimensional plane of BR(Q -> Wq) versus BR(Q -> Hq).
  •  
Skapa referenser, mejla, bekava och länka
Typ av publikation
tidskriftsartikel (350)
forskningsöversikt (5)
konferensbidrag (1)
Typ av innehåll
refereegranskat (347)
övrigt vetenskapligt (9)
Författare/redaktör
Yang, H. (187)
Zhang, X. (185)
Kretz, M. (176)
Zhu, J. (166)
Yamaguchi, Y. (148)
Lee, S. C. (142)
visa fler...
Zhu, H. (141)
Li, S. (138)
Urban, J. (124)
Bianchi, L. (123)
Zhang, H. (120)
Kim, D. W. (119)
Kim, S. H. (118)
Liu, L. (118)
Gupta, A. (118)
Zaman, A. (114)
Kim, S. (114)
Marin, A. (113)
Riegler, W. (113)
Adamova, D. (113)
Akindinov, A. (113)
Aleksandrov, D. (113)
Alessandro, B. (113)
Alici, A. (113)
Andrei, C. (113)
Andronic, A. (113)
Antinori, F. (113)
Aphecetche, L. (113)
Arcelli, S. (113)
Arnaldi, R. (113)
Augustinus, A. (113)
Bala, R. (113)
Barbera, R. (113)
Barret, V. (113)
Basile, M. (113)
Bastid, N. (113)
Bellwied, R. (113)
Belmont-Moreno, E. (113)
Berceanu, I. (113)
Bercuci, A. (113)
Betev, L. (113)
Bhasin, A. (113)
Bianchi, N. (113)
Blanco, F. (113)
Blau, D. (113)
Blume, C. (113)
Borel, H. (113)
Bruna, E. (113)
Budnikov, D. (113)
Buesching, H. (113)
visa färre...
Lärosäte
Lunds universitet (247)
Karolinska Institutet (67)
Kungliga Tekniska Högskolan (62)
Uppsala universitet (57)
Stockholms universitet (15)
Linköpings universitet (14)
visa fler...
Umeå universitet (12)
Göteborgs universitet (9)
Chalmers tekniska högskola (7)
Luleå tekniska universitet (2)
Jönköping University (2)
Malmö universitet (1)
Södertörns högskola (1)
Linnéuniversitetet (1)
Karlstads universitet (1)
Sveriges Lantbruksuniversitet (1)
visa färre...
Språk
Engelska (356)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (248)
Medicin och hälsovetenskap (58)
Teknik (7)
Lantbruksvetenskap (2)
Samhällsvetenskap (2)

År

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy